4(m-1)=20

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Solution for 4(m-1)=20 equation: 



4(m-1)=20

We move all terms to the left:

4(m-1)-(20)=0

We multiply parentheses

4m-4-20=0

We add all the numbers together, and all the variables

4m-24=0

We move all terms containing m to the left, all other terms to the right

4m=24

m=24/4

m=6

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